A woman hires a hit man to get rid of her rich, philandering husband. Either, a. she's unaware that her husband out bid her and gave her to the hitman as a bonus, or b. he succeeds and she founds out that they were actually broke, leaving her without the ability to pay off the very dangerous man.
A gang-bang line. Standard non-con, or maybe she got paid to take it anyway they wanted for the weekend.
An AU sci-fi line. Advanced tech, severe class division, possible slavery, breeding, and lots of kinks.